NOAO >   Observing Info >   Approved Programs >   2007B-0509

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Proposal Information for 2007B-0509


PI: Induk Lee, Seoul National University, idlee@astro.snu.ac.kr
Address: Dep't of Physics and Astronomy, San 56-1, Shillim-dong, Gwanak-gu, Seoul 151-747, S.Korea

CoI: Myungshin Im, Seoul National University

Title: Bright Quasar Survey at Low Galactic Latitude

Abstract: Thanks to the recent large area surveys such as the Sloan Digital Sky Survey and the 2dF/6dF, the total number of known QSOs have dramatically increased to more than 100,000. However, we have not arrived yet at the complete census of QSOs. The area near the galactic plane still has not been explored thoroughly for QSOs. QSOs at low galactic latitude can have many astrophysical applications such as studying the galactic matter through absorption lines and serving as reference points for understanding the motion of galactic objects. However, the low galactic latitude region has been the place to avoid when searching for QSOs, since high number density of stars and high galactic extinction have hindered efficient identification of QSO candidates. Despite of these difficulties, we have recently discovered 40 bright QSOs/AGNs at low galactic latitude by selecting candidates using a method employing both NIR and radio data. Our QSO/AGN identification efficiency is found to be about 50%, demonstrating that QSOs/AGNs can be discovered efficiently even at low galactic latitude. Building up on our previous success, we propose to identify more low galactic latitude QSOs by (i) extending the QSO survey region to the southern hemisphere, and (ii) extending the search parameter space. To identify QSOs spectroscopically, we will use the R-C spectrograph on the CTIO 1.5m telescope (southern hemisphere) and the GoldCam CCD spectrograph on the KPNO 2.1m telescope (northern hemisphere). From our observation, We expect to find 150 bright quasars at low galactic latitude which will be useful for many astrophysical studies.


National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360



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